目录

学习目标

学习内容

 739. 每日温度 

  496.下一个更大元素 I  

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学习目标

学习内容

 739. 每日温度 

739. 每日温度 - 力扣（LeetCode）https://leetcode.cn/problems/daily-temperatures/

class Solution:
    def dailyTemperatures(self, temperatures: List[int]) -> List[int]:
        n = len(temperatures)
        res = [0]*n
        stack = []
        for i in range(n):
            while stack and temperatures[stack[-1]]<temperatures[i]:
                e = stack.pop()
                res[e] = i-e
            stack.append(i)
        return res

  496.下一个更大元素 I  

496. 下一个更大元素 I - 力扣（LeetCode）https://leetcode.cn/problems/next-greater-element-i/

from collections import defaultdict
class Solution:
    def nextGreaterElement(self, nums1: List[int], nums2: List[int]) -> List[int]:
        n = len(nums1)
        m = len(nums2)
        dic = defaultdict()
        stack = []
        for i in range(m):
            while stack and stack[-1]<nums2[i]:
                e = stack.pop()
                dic[e]=nums2[i]
            stack.append(nums2[i])
        for i in range(n):
            nums1[i]=dic[nums1[i]] if nums1[i] in dic else -1
        return nums1